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chengjizhuanhuan
- 输入一个百分制的成绩t,将其转换成对应的等级,具体转换规则如下: 90~100为A 80~89为B 70~79为C 60~69为D 0~59为E -Enter a percentile score t, to convert it to the corresponding level of the specific conversion rule is as follows: 90 to 100 of A 80 ~ 89 is B 70 ~ 79 is C